Enantioselective synthesis of α-hydroxy γ-butyrolactones from an ephedrine-derived morpholine-dione
作者:Sunil V Pansare、Bidhan A Shinkre、Annyt Bhattacharyya
DOI:10.1016/s0040-4020(02)01151-1
日期:2002.10
An ephedrine-derived morpholine dione is employed in the enantioselective synthesis of (S)-alpha-hydroxy- gamma,gamma-dimethyl-gamma-butyrolactone and (S)-alpha-hydroxy gamma-butyrolactone. A one-pot alkylation/allylation protocol for the stereoselective conversion of the dione to 2-alkyl-2-allyl morpholinones, key intermediates for alpha-alkyl-alpha-hydroxy-gamma-butyrolactones, is described. (C) 2002 Elsevier Science Ltd. All rights reserved.